Resources Contact Us Home
Dual mode QAM/VSB receiver

Image Number 14 for United States Patent #6842495.

A television receiver system capable of receiving and demodulating television signal information content that has been modulated and transmitted in accordance with a variety of modulation formats is disclosed. In particular, the system is able to accommodate receipt and demodulation of at least 8 and 16-VSB modulated signals in order to support US HDTV applications, as well as 64 and 256-QAM modulated signals, for European and potential US CATV implementations. The system includes carrier and timing recovery loops adapted to operate on an enhanced pilot signal as well as decision directed carrier phase recovery loops. Phase detectors operate on I and Q rail signals, or generate a Q rail from a Hilbert transform of the I rail. Decision directed loops incorporate a trellis decoder in order to operate on sequence estimated decisions for improved reliability in poor SNR environments.

  Recently Added Patents
Transfer of digital data through an isolation
Rewriting branch instructions using branch stubs
Scanned image projection system employing intermediate image plane
Motor control system, motor control device, and brushless motor
Rear body panel cover for a motor vehicle
Electronic multiparty accounts receivable and accounts payable system
Cover opening and closing unit and image forming apparatus including the same
  Randomly Featured Patents
Chip-type resonator and method of manufacturing the same
Combination ceiling fan and light fixture
Telephoto sensor trigger in a solid state motion analysis system
Ink carriers containing surface modified nanoparticles, phase change inks including same, and methods for making same
1,2,4-Triazole antimycotic compositions and use thereof
Image information processing method and apparatus therefor with multi-level data capability
Automotive suspension strut with increased stroke
Non-isolated bus converters with voltage divider topology
Fastener fabric and related method
Well bore wall cleaner